'99 & up 7.3L Power Stroke Engine and DrivetrainDiscussion of the 99 & up 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

I am in the middle replacing the water pump on my 99 7.3L F250 and I noticed the impeller blades on the new pump (AirTek) slightly touch the pump housing. The impeller spins fine but on the old pump I pulled off the truck there is a gap and no contact. Do I need to return the new one or will it wear into the slight gap?

I'd say get a new one. I bought a Ford Waterpump last year, and I too had just a bit of impeller rub on the housing. I also noticed that the seal would squeal just a little bit when I started to turn the impeller.

Something is not right with that particular pump. A couple of years ago I bought a new OEM pump from DIESELSITE.com to have a spare and it was a good deal at the time. I still have it in the box in my shop have not needed to install it . The impeller on the new pump I have does not rub the housing. Take that one back and get another, I wouldn't install that one. 106

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